MD History: Remove usage of iron-flex-layout from MD History

chrome/browser/resources/md_history/history_item.html

 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
-<link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/iron-flex-layout.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-checkbox/paper-checkbox.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="chrome://resources/html/icon.html">
 <link rel="import" href="chrome://resources/html/util.html">
 <link rel="import" href="chrome://history/browser_service.html">
 <link rel="import" href="chrome://history/constants.html">
 <link rel="import" href="chrome://history/searched_label.html">
 <link rel="import" href="chrome://history/shared_style.html">
@@ skipping 27 matching lines @@
 
       #date-accessed {
         display: none;
       }
 
       :host([is-card-start]) #date-accessed {
         display: flex;
       }
 
       #item-container {
-        @apply(--layout-center);
-        @apply(--layout-horizontal);
+        align-items: center;
+        display: flex;
         min-height: var(--item-height);
       }
 
       :host([is-card-start]) #item-container {
         padding-top: var(--card-first-last-item-padding);
       }
 
       :host([is-card-end]) #item-container {
         padding-bottom: var(--card-first-last-item-padding);
       }
 
       #title-and-domain {
-        @apply(--layout-center);
-        @apply(--layout-flex);
-        @apply(--layout-horizontal);
+        align-items: center;
+        display: flex;
+        flex: 1;
         height: var(--item-height);
         overflow: hidden;
       }
 
       paper-checkbox {
         --paper-checkbox-checked-color: rgb(68, 136, 255);
         --paper-checkbox-size: 16px;
         --paper-checkbox-unchecked-color: var(--secondary-text-color);
         height: 16px;
         margin: 0 16px 0 20px;
@@ skipping 100 matching lines @@
             <div></div>
             <div></div>
           </button>
         </div>
         <div id="time-gap-separator" hidden="[[!hasTimeGap]]"></div>
       </div>
     </div>
   </template>
   <script src="chrome://history/history_item.js"></script>
 </dom-module>